RECON: TNO occultation with 456826

Event between (456826) 07TH422 and star UC4-522-011492 with event index number of 104261

Geocentric closest approach at 2018/01/24 07:26:21 UTC

J2000 position of star is 05:15:29.9 +14:20:49
Equinox of date position of star is 05:16:25.2 +14:21:51
Stellar brightness R=16.5
Star is 52 degrees from the moon. Moon is 43% illuminated.
TNO apparent brightness V=22.4

[RECON map]
TNO is 29.3 AU from the Sun and 28.6 AU from the Earth.
The TNO is moving 17.2 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 156 seconds.
The 1-sigma cross-track error in the shadow position is 1889 km.

The TNO has an absolute magnitude Hv=7.6
Diameter=182.0 km assuming a 5% albedo -- 10.6 sec chord
Diameter=74.3 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 456826, (2018/01/24 07:26UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:36:57.6 +16:32:39  0.8  9.78  43
Bellatrix      05:26:06.0 +06:21:53  1.6  8.34  55
15 Ori         05:10:44.1 +15:37:07  5.2  1.88  51
PPM 120759     05:16:11.0 +15:04:54  7.2  0.72  52
PPM 120776     05:17:31.9 +14:09:56  9.3  0.32  53
PPM 120763     05:16:38.4 +14:19:16 10.5  0.05  52
456826         05:16:31.5 +14:21:58 16.5        53
Positions are for equinox of date

This table contains the target star visibility for the RECON network. The observing range has been set to a maximum of 5.0 sigma about the mid-time.
The median site spacing is 17.2 km RECON observability=1.0 and success probability=0.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 07:25:00 -58.9 Dark Up 44.3 233.6 Up 07:11:32 - 07:38:29 7597
Tonasket 07:25:00 -59.1 Dark Up 44.4 233.8 Up 07:11:32 - 07:38:29 7580
Okanogan 07:24:59 -59.4 Dark Up 44.7 233.9 Up 07:11:31 - 07:38:28 7552
Brewster 07:24:58 -59.6 Dark Up 45.0 233.9 Up 07:11:30 - 07:38:27 7527
Manson/Chelan 07:24:58 -59.7 Dark Up 45.3 233.7 Up 07:11:29 - 07:38:26 7503
Entiat 07:24:58 -59.9 Dark Up 45.5 233.8 Up 07:11:29 - 07:38:26 7485
Wenatchee 07:24:57 -60.1 Dark Up 45.7 233.8 Up 07:11:29 - 07:38:26 7463
Ellensburg 07:24:56 -60.4 Dark Up 46.0 233.9 Up 07:11:28 - 07:38:25 7427
Yakima 07:24:55 -60.8 Dark Up 46.3 234.2 Up 07:11:26 - 07:38:23 7396
Toppenish/White Swan 07:24:53 -61.0 Dark Up 46.3 234.6 Up 07:11:25 - 07:38:22 7385
Pasco 07:24:49 -61.5 Dark Up 45.7 236.1 Up 07:11:20 - 07:38:17 7411
PNWRO 07:24:47 -61.8 Dark Up 45.7 236.6 Up 07:11:18 - 07:38:15 7399
George/Umatilla 07:24:48 -61.7 Dark Up 46.0 236.2 Up 07:11:20 - 07:38:17 7380
Goldendale 07:24:53 -61.4 Dark Up 46.9 234.6 Up 07:11:24 - 07:38:21 7332
The Dalles 07:24:53 -61.5 Dark Up 47.2 234.4 Up 07:11:24 - 07:38:21 7304
Maupin 07:24:51 -61.9 Dark Up 47.4 234.9 Up 07:11:23 - 07:38:20 7276
Madras/Culver 07:24:49 -62.4 Dark Up 47.8 235.3 Up 07:11:21 - 07:38:18 7233
Sisters 07:24:49 -62.5 Dark Up 48.2 235.1 Up 07:11:21 - 07:38:18 7194
Redmond 07:24:48 -62.7 Dark Up 48.0 235.6 Up 07:11:19 - 07:38:16 7204
Bend 07:24:47 -62.8 Dark Up 48.2 235.6 Up 07:11:19 - 07:38:16 7183
Oregon Observatory 07:24:46 -62.9 Dark Up 48.4 235.6 Up 07:11:18 - 07:38:15 7166
LaPine/Gilchrist 07:24:47 -63.1 Dark Up 48.5 235.7 Up 07:11:18 - 07:38:15 7148
North Lake 07:24:42 -63.7 Dark Up 48.4 236.8 Up 07:11:14 - 07:38:11 7132
Paisley 07:24:39 -64.3 Dark Up 48.5 237.7 Up 07:11:10 - 07:38:07 7099
Chiloquin 07:24:44 -63.9 Dark Up 49.4 236.4 Up 07:11:15 - 07:38:12 7050
Klamath Falls 07:24:42 -64.2 Dark Up 49.5 236.8 Up 07:11:13 - 07:38:10 7025
Lakeview 07:24:36 -64.8 Dark Up 48.7 238.4 Up 07:11:08 - 07:38:05 7064
Tulelake 07:24:39 -64.6 Dark Up 49.5 237.4 Up 07:11:11 - 07:38:08 7012
Cedarville 07:24:33 -65.4 Dark Up 48.9 239.2 Up 07:11:05 - 07:38:02 7017
Fall River/Burney 07:24:35 -65.4 Dark Up 49.9 238.4 Up 07:11:07 - 07:38:04 6941
Susanville 07:24:31 -66.2 Dark Up 49.8 239.8 Up 07:11:03 - 07:38:00 6912
Greenville 07:24:31 -66.3 Dark Up 50.1 239.8 Up 07:11:02 - 07:37:59 6881
Niwot 07:23:40 -69.0 Dark Down 39.2 254.4 Up 07:10:12 - 07:37:09 7363
Quincy 07:24:31 -66.5 Dark Up 50.2 240.0 Up 07:11:03 - 07:38:00 6864
Portola 07:24:28 -66.8 Dark Up 50.0 240.6 Up 07:10:59 - 07:37:56 6869
Reno 07:24:25 -67.3 Dark Up 49.7 241.6 Up 07:10:57 - 07:37:54 6867
Carson City 07:24:23 -67.6 Dark Up 49.8 242.0 Up 07:10:55 - 07:37:52 6838
Yerington 07:24:20 -68.0 Dark Up 49.5 242.8 Up 07:10:52 - 07:37:49 6841
Gardnerville 07:24:22 -67.8 Dark Up 49.9 242.3 Up 07:10:54 - 07:37:51 6819
Hawthorne 07:24:17 -68.6 Dark Up 49.3 243.8 Up 07:10:48 - 07:37:45 6820
Lee Vining 07:24:16 -68.9 Dark Up 49.9 243.9 Up 07:10:48 - 07:37:45 6757
Tonopah 07:24:09 -69.5 Dark Up 48.6 245.7 Up 07:10:41 - 07:37:38 6826
Bishop 07:24:10 -69.7 Dark Up 49.7 245.3 Up 07:10:42 - 07:37:39 6730
Lone Pine 07:24:07 -70.5 Dark Up 49.8 246.4 Up 07:10:38 - 07:37:35 6676
Beatty 07:24:02 -70.7 Dark Up 48.7 247.3 Up 07:10:33 - 07:37:30 6743
Indian Springs 07:23:58 -71.4 Dark Up 48.0 248.7 Up 07:10:30 - 07:37:27 6751
Henderson 07:23:53 -72.1 Dark Up 47.7 249.8 Up 07:10:24 - 07:37:21 6728
Searchlight/Boulder City 07:23:50 -72.6 Dark Up 47.9 250.5 Up 07:10:22 - 07:37:19 6682
CPSLO 07:24:12 -70.4 Dark Up 52.2 245.3 Up 07:10:44 - 07:37:41 6480
Kingman/Dolan Springs 07:23:47 -73.1 Dark Down 47.3 251.5 Up 07:10:18 - 07:37:15 6687
Laughlin/Bullhead City 07:23:49 -73.0 Dark Up 47.7 251.1 Up 07:10:20 - 07:37:17 6668
DCO 07:23:44 -73.4 Dark Down 46.6 252.3 Up 07:10:15 - 07:37:12 6710
Mohave Valley 07:23:47 -73.2 Dark Up 47.8 251.4 Up 07:10:18 - 07:37:15 6645
Lake Havasu City 07:23:45 -73.7 Dark Up 47.7 252.0 Up 07:10:17 - 07:37:14 6619
Parker 07:23:43 -74.0 Dark Down 47.8 252.4 Up 07:10:15 - 07:37:12 6590
Idyllwild 07:23:49 -73.5 Dark Up 49.8 250.8 Up 07:10:21 - 07:37:18 6475
Blythe 07:23:42 -74.4 Dark Up 48.2 252.7 Up 07:10:14 - 07:37:11 6535
Calipatria 07:23:44 -74.5 Dark Up 49.1 252.4 Up 07:10:15 - 07:37:12 6460
Yuma 07:23:40 -75.2 Dark Up 48.5 253.6 Up 07:10:11 - 07:37:08 6453

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Event circumstances last updated at 2016/03/22 17:04:40 UT

Marc W. Buie, Southwest Research Institute

RECON